New State Stonefly (Plecoptera) Records For Pennsylvania, With Additional Records And Information On Rare Species Author Earle, Jane I. text Illiesia 2009 5 16 169 181 journal article 6786 10.5281/zenodo.4759416 07c83cbb-d592-43c1-894e-9fbcd0f48339 1854-0392 4759416 Ostrocera nymphs are rarely collected during routine water quality monitoring; however, they can be common in small acidic, often intermittent creeks and spring runs ( Earle 2004b ). Adults can also be collected alongside small to medium cold water creeks, presumably emerging from nearby springs or seepage areas. The most common Pennsylvania species is O. albidipennis (Walker) .